body h2 {
  color: #00f;
}

a {
  color: yellow;
}

a:hover {
  font-size: 40px;
  color: #00f;
}

.main {
  width: 1200px;
  margin: auto;
  border: 1px solid #000;
}

.content {
  width: 1200px;
  margin: auto;
  border: 1px solid #000;
}
